perfidy

noun

1. 背叛；背信弃义
   unfair treatment of sb who trusts you

1. 背信弃义；背叛；不忠；不仁不义
   Perfidy is the action of betraying someone or behaving very badly towards someone.

1. Such perfidy and pride, envy and ambition, homicide and murder, cruelty and savagery, lawlessness and lust;
   这般背叛与骄傲、忌妒与野心、屠戮与谋杀、残忍与野蛮、违法与贪婪；
2. Would the man's perfidy never reach a limit?
   这个人的背信弃义难道永远没有止境吗？
3. The hard-boiled military observers declared the reason lay in the refusal of Chinese armies to obey American advice, in the stupidity of Chiang Kai-shek, in the perfidy of local leaders and so on.
   顽固的军事观察家宣称，这是由于中国军队不听美国指导、蒋介石的愚蠢、地方领导人的背信弃义，等等。
4. He was quite certain now that she knew he was married and was angered at his perfidy.
   他现在已可以断定，她已经得知他是有妇之夫，对于他的欺瞒行为非常生气。
5. He is at this time transporting large armies of foreign mercenaries to compleat the works of death, desolation and tyranny, already begun with circumstances of cruelty& perfidy scarcely paralleled in the most barbarous ages, and totally unworthy the head of a civilized nation.
   他此刻正在调运大量的外籍雇佣军，意在制造死亡、毁灭和专制暴虐。他已经造成即使在人类历史上最野蛮的时代都罕见的残暴和背信弃义的气氛。他完全不配做一个文明国家的元首。
6. We should carry out such tasks as making the law, establishing a supervision system for perfidy, quickening the construction of honest and credit system, and reinforcing the citizen's morality education.
   因此，制定实施信用法律法规，建立相应的监督与惩戒机制，加快信用制度建设步伐，在全社会加强公民诚信道德教育，已是刻不容缓。

noun

1. an act of deliberate betrayal

   Synonym:    treacherybetrayaltreason

2. betrayal of a trust

   Synonym:    perfidiousnesstreachery